Lyric discussion by air9in 

Cover art for Eet lyrics by Regina Spektor

"Eet" is actually a key of old typewriters that whenever you made a mistake didn't exactly erase it, but it just went back to the spot that the letter occupied and allowed you to type another letter over the "wrong" letter. Regina here wish there was an "eet" key for life

Um, there is actually not an "eet" key on actual typewriters. The typewriter on the video has some fanciful and imaginary characters, of which "eet" is one.

http://upload.wikimedia.org/wikipedia/commons/8/83/Keyboard_on_a_typewriter.jpg